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US 12,624,727 B2Granted
Ceramic ball material comprising a band-portion over surface of a spherical portion, and method for manufacturing ceramic ball
AssigneeNiterra Materials Co., Ltd.
InventorsKai Funaki, Shoya Sano
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Abstract
A ceramic ball material according to the present embodiment includes a spherical portion, and a band-shaped portion formed over a circumference of a surface of the spherical portion. The band-shaped portion has a width in a range of 0.5 mm or more and 4.0 mm or less, both shoulders of which are provided with an R section having a radius of curvature of 0.02 mm or more. Any one of aluminum oxide, silicon nitride, boron nitride, and zirconium oxide is used as the ceramic.
Claims18
A ceramic ball material, comprising:
- a spherical portion;
- and
- a band-shaped portion formed over a circumference of a surface of the spherical portion,
- wherein the band-shaped portion has a width in a range of 0.5 mm or more and 4.0 mm or less, both shoulders of which are provided with an R section having a radius of curvature of 0.02 mm or more, and
- wherein an outer periphery of the band-shaped portion is concave with respect to both shoulders, the concave outer periphery having a radius of curvature of 5 mm or more.
2 more elements
Dependencies are inferred from the claim text.